Description

1973-1974 Chevy/GMC Pick-Up 1/2, 3/4, 1-Ton, 2WD, 1973-1974 Blazer/Jimmy/Suburban 2WD: 283-400, Tube Size 1.625″, Collector Size 3″Horsepower and Torque increased over conventional header designBig 3â? secondary collector for reduced back pressureTuned-length primary tubes combine with Velocity Tube to smooth out exhaust pulsesPatented Velocity Tube increases cylinder scavengingAll hardware and premium gaskets includedfor a complete installation

Air Injection Tubes:No

Bolt size:3/8-16 x 3/4 IN

Bolts Included: Yes

Collector Attachment: 3-Bolt Flange

Collector Diameter: 3.00″

Collector Port Diameter: 3.00″

Collector Reducer Included:Yes

Collector Reducer Outlet Diameter:2.50 IN

Color: Black

Design: Long Tube

Design:Afterburner

Drive: 2WD

EGT Port: No

Engine: Chevrolet Small Block Gen I

Finish: Painted

Flange Thickness: 0.3125″

Flange Thickness:5/16 IN

Gasket Or Seal Included: Yes

Grade Type: Performance

Header Series:Flowtech I

Header Style: Long Tube

Material: Mild Steel

Mounting Hardware Included: Yes

Oxygen Sensor Port: No

Port Shape: Oval

Primary Tubing Diameter: 1.625 Inch

Primary Tubing Diameter:1 5/8 IN

Quantity: Sold as a Pair

Sheen Level: Satin

Tube Wall Thickness: 16 GU